1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/*
* Copyright (C) 2008-2009 Free Software Foundation
* Written by Simon Josefsson
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "zerosize-ptr.h"
#define ASSERT(expr) \
do \
{ \
if (!(expr)) \
{ \
fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
fflush (stderr); \
abort (); \
} \
} \
while (0)
int
main (void)
{
/* Test equal / not equal distinction. */
ASSERT (memcmp (zerosize_ptr (), zerosize_ptr (), 0) == 0);
ASSERT (memcmp ("foo", "foobar", 2) == 0);
ASSERT (memcmp ("foo", "foobar", 3) == 0);
ASSERT (memcmp ("foo", "foobar", 4) != 0);
ASSERT (memcmp ("foo", "bar", 1) != 0);
ASSERT (memcmp ("foo", "bar", 3) != 0);
/* Test less / equal / greater distinction. */
ASSERT (memcmp ("foo", "moo", 4) < 0);
ASSERT (memcmp ("moo", "foo", 4) > 0);
ASSERT (memcmp ("oomph", "oops", 3) < 0);
ASSERT (memcmp ("oops", "oomph", 3) > 0);
ASSERT (memcmp ("foo", "foobar", 4) < 0);
ASSERT (memcmp ("foobar", "foo", 4) > 0);
/* Some old versions of memcmp were not 8-bit clean. */
ASSERT (memcmp ("\100", "\201", 1) < 0);
ASSERT (memcmp ("\201", "\100", 1) > 0);
ASSERT (memcmp ("\200", "\201", 1) < 0);
ASSERT (memcmp ("\201", "\200", 1) > 0);
/* The Next x86 OpenStep bug shows up only when comparing 16 bytes
or more and with at least one buffer not starting on a 4-byte boundary.
William Lewis provided this test program. */
{
char foo[21];
char bar[21];
int i;
for (i = 0; i < 4; i++)
{
char *a = foo + i;
char *b = bar + i;
strcpy (a, "--------01111111");
strcpy (b, "--------10000000");
ASSERT (memcmp (a, b, 16) < 0);
}
}
return 0;
}
|
